cdr.c: Eliminated many calls to ao2_global_obj_ref().

The CDR performance gets worse the further it gets behind in processing
stasis messages.  One of the reasons is we were getting the global config
to determine if we needed to log a debugging message.

* Many calls to ao2_global_obj_ref() were just so we could determine if
debug mode is enabled.  Made a global flag to check instead.

* Eliminated many RAII_VAR() usages associated with the remaining
ao2_global_obj_ref() calls.

* Added missing NULL checks for the returned ao2_global_obj_ref() value.

ASTERISK-27335

Change-Id: Iceaad93172862f610cad0188956634187bfcc7cd

1 files changed, 184 insertions, 123 deletions

diff --git a/main/cdr.c b/main/cdr.c
index dc5c947fd..def3871bc 100644
--- a/main/cdr.c
+++ b/main/cdr.c
@@ -207,9 +207,16 @@
 #define DEFAULT_BATCH_SCHEDULER_ONLY "0"
 #define DEFAULT_BATCH_SAFE_SHUTDOWN "1"
 
-#define CDR_DEBUG(mod_cfg, fmt, ...) \
+#define cdr_set_debug_mode(mod_cfg) \
 	do { \
-		if (ast_test_flag(&(mod_cfg)->general->settings, CDR_DEBUG)) { \
+		cdr_debug_enabled = ast_test_flag(&(mod_cfg)->general->settings, CDR_DEBUG); \
+	} while (0)
+
+static int cdr_debug_enabled;
+
+#define CDR_DEBUG(fmt, ...) \
+	do { \
+		if (cdr_debug_enabled) { \
 			ast_verbose((fmt), ##__VA_ARGS__); \
 		} \
 	} while (0)
@@ -237,6 +244,7 @@ static struct aco_type general_option = {
 
 static void *module_config_alloc(void);
 static void module_config_destructor(void *obj);
+static void module_config_post_apply(void);
 
 /*! \brief The file definition */
 static struct aco_file module_file_conf = {
@@ -247,10 +255,23 @@ static struct aco_file module_file_conf = {
 
 CONFIG_INFO_CORE("cdr", cfg_info, module_configs, module_config_alloc,
 	.files = ACO_FILES(&module_file_conf),
+	.post_apply_config = module_config_post_apply,
 );
 
 static struct aco_type *general_options[] = ACO_TYPES(&general_option);
 
+static void module_config_post_apply(void)
+{
+	struct module_config *mod_cfg;
+
+	mod_cfg = ao2_global_obj_ref(module_configs);
+	if (!mod_cfg) {
+		return;
+	}
+	cdr_set_debug_mode(mod_cfg);
+	ao2_cleanup(mod_cfg);
+}
+
 /*! \brief Dispose of a module config object */
 static void module_config_destructor(void *obj)
 {
@@ -764,9 +785,7 @@ static void cdr_object_snapshot_copy(struct cdr_object_snapshot *dst, struct cdr
  */
 static void cdr_object_transition_state(struct cdr_object *cdr, struct cdr_object_fn_table *fn_table)
 {
-	RAII_VAR(struct module_config *, mod_cfg, ao2_global_obj_ref(module_configs), ao2_cleanup);
-
-	CDR_DEBUG(mod_cfg, "%p - Transitioning CDR for %s from state %s to %s\n",
+	CDR_DEBUG("%p - Transitioning CDR for %s from state %s to %s\n",
 		cdr, cdr->party_a.snapshot->name,
 		cdr->fn_table ? cdr->fn_table->name : "NONE", fn_table->name);
 	cdr->fn_table = fn_table;
@@ -874,7 +893,6 @@ static void cdr_object_dtor(void *obj)
  */
 static struct cdr_object *cdr_object_alloc(struct ast_channel_snapshot *chan)
 {
-	RAII_VAR(struct module_config *, mod_cfg, ao2_global_obj_ref(module_configs), ao2_cleanup);
 	struct cdr_object *cdr;
 
 	ast_assert(chan != NULL);
@@ -897,7 +915,7 @@ static struct cdr_object *cdr_object_alloc(struct ast_channel_snapshot *chan)
 	cdr->party_a.snapshot = chan;
 	ao2_t_ref(cdr->party_a.snapshot, +1, "bump snapshot during CDR creation");
 
-	CDR_DEBUG(mod_cfg, "%p - Created CDR for channel %s\n", cdr, chan->name);
+	CDR_DEBUG("%p - Created CDR for channel %s\n", cdr, chan->name);
 
 	cdr_object_transition_state(cdr, &single_state_fn_table);
 
@@ -1221,13 +1239,11 @@ static struct ast_cdr *cdr_object_create_public_records(struct cdr_object *cdr)
  */
 static void cdr_object_dispatch(struct cdr_object *cdr)
 {
-	RAII_VAR(struct module_config *, mod_cfg,
-			ao2_global_obj_ref(module_configs), ao2_cleanup);
 	struct ast_cdr *pub_cdr;
 
-	CDR_DEBUG(mod_cfg, "%p - Dispatching CDR for Party A %s, Party B %s\n", cdr,
-			cdr->party_a.snapshot->name,
-			cdr->party_b.snapshot ? cdr->party_b.snapshot->name : "<none>");
+	CDR_DEBUG("%p - Dispatching CDR for Party A %s, Party B %s\n", cdr,
+		cdr->party_a.snapshot->name,
+		cdr->party_b.snapshot ? cdr->party_b.snapshot->name : "<none>");
 	pub_cdr = cdr_object_create_public_records(cdr);
 	cdr_detach(pub_cdr);
 }
@@ -1327,13 +1343,12 @@ static void cdr_object_check_party_a_hangup(struct cdr_object *cdr)
  * \brief Check to see if a CDR needs to be answered based on its Party A.
  * Note that this is safe to call as much as you want - we won't answer twice
  */
-static void cdr_object_check_party_a_answer(struct cdr_object *cdr) {
-	RAII_VAR(struct module_config *, mod_cfg, ao2_global_obj_ref(module_configs), ao2_cleanup);
-
+static void cdr_object_check_party_a_answer(struct cdr_object *cdr)
+{
 	if (cdr->party_a.snapshot->state == AST_STATE_UP && ast_tvzero(cdr->answer)) {
 		cdr->answer = ast_tvnow();
 		/* tv_usec is suseconds_t, which could be int or long */
-		CDR_DEBUG(mod_cfg, "%p - Set answered time to %ld.%06ld\n", cdr,
+		CDR_DEBUG("%p - Set answered time to %ld.%06ld\n", cdr,
 			(long)cdr->answer.tv_sec,
 			(long)cdr->answer.tv_usec);
 	}
@@ -1489,15 +1504,13 @@ static void single_state_process_party_b(struct cdr_object *cdr, struct ast_chan
 
 static int single_state_process_dial_begin(struct cdr_object *cdr, struct ast_channel_snapshot *caller, struct ast_channel_snapshot *peer)
 {
-	RAII_VAR(struct module_config *, mod_cfg, ao2_global_obj_ref(module_configs), ao2_cleanup);
-
 	if (caller && !strcasecmp(cdr->party_a.snapshot->name, caller->name)) {
 		base_process_party_a(cdr, caller);
-		CDR_DEBUG(mod_cfg, "%p - Updated Party A %s snapshot\n", cdr,
-				cdr->party_a.snapshot->name);
+		CDR_DEBUG("%p - Updated Party A %s snapshot\n", cdr,
+			cdr->party_a.snapshot->name);
 		cdr_object_swap_snapshot(&cdr->party_b, peer);
-		CDR_DEBUG(mod_cfg, "%p - Updated Party B %s snapshot\n", cdr,
-				cdr->party_b.snapshot->name);
+		CDR_DEBUG("%p - Updated Party B %s snapshot\n", cdr,
+			cdr->party_b.snapshot->name);
 
 		/* If we have two parties, lock the application that caused the
 		 * two parties to be associated. This prevents mid-call event
@@ -1507,8 +1520,8 @@ static int single_state_process_dial_begin(struct cdr_object *cdr, struct ast_ch
 	} else if (!strcasecmp(cdr->party_a.snapshot->name, peer->name)) {
 		/* We're the entity being dialed, i.e., outbound origination */
 		base_process_party_a(cdr, peer);
-		CDR_DEBUG(mod_cfg, "%p - Updated Party A %s snapshot\n", cdr,
-				cdr->party_a.snapshot->name);
+		CDR_DEBUG("%p - Updated Party A %s snapshot\n", cdr,
+			cdr->party_a.snapshot->name);
 	}
 
 	cdr_object_transition_state(cdr, &dial_state_fn_table);
@@ -1530,7 +1543,6 @@ static int single_state_process_dial_begin(struct cdr_object *cdr, struct ast_ch
 static int single_state_bridge_enter_comparison(struct cdr_object *cdr,
 		struct cdr_object *cand_cdr)
 {
-	RAII_VAR(struct module_config *, mod_cfg, ao2_global_obj_ref(module_configs), ao2_cleanup);
 	struct cdr_object_snapshot *party_a;
 
 	/* Don't match on ourselves */
@@ -1541,7 +1553,7 @@ static int single_state_bridge_enter_comparison(struct cdr_object *cdr,
 	/* Try the candidate CDR's Party A first */
 	party_a = cdr_object_pick_party_a(&cdr->party_a, &cand_cdr->party_a);
 	if (!strcasecmp(party_a->snapshot->name, cdr->party_a.snapshot->name)) {
-		CDR_DEBUG(mod_cfg, "%p - Party A %s has new Party B %s\n",
+		CDR_DEBUG("%p - Party A %s has new Party B %s\n",
 			cdr, cdr->party_a.snapshot->name, cand_cdr->party_a.snapshot->name);
 		cdr_object_snapshot_copy(&cdr->party_b, &cand_cdr->party_a);
 		if (!cand_cdr->party_b.snapshot) {
@@ -1561,7 +1573,7 @@ static int single_state_bridge_enter_comparison(struct cdr_object *cdr,
 	}
 	party_a = cdr_object_pick_party_a(&cdr->party_a, &cand_cdr->party_b);
 	if (!strcasecmp(party_a->snapshot->name, cdr->party_a.snapshot->name)) {
-		CDR_DEBUG(mod_cfg, "%p - Party A %s has new Party B %s\n",
+		CDR_DEBUG("%p - Party A %s has new Party B %s\n",
 			cdr, cdr->party_a.snapshot->name, cand_cdr->party_b.snapshot->name);
 		cdr_object_snapshot_copy(&cdr->party_b, &cand_cdr->party_b);
 		return 0;
@@ -1937,7 +1949,6 @@ static int dial_status_end(const char *dialstatus)
  */
 static void handle_dial_message(void *data, struct stasis_subscription *sub, struct stasis_message *message)
 {
-	RAII_VAR(struct module_config *, mod_cfg, ao2_global_obj_ref(module_configs), ao2_cleanup);
 	struct cdr_object *cdr;
 	struct ast_multi_channel_blob *payload = stasis_message_data(message);
 	struct ast_channel_snapshot *caller;
@@ -1961,12 +1972,12 @@ static void handle_dial_message(void *data, struct stasis_subscription *sub, str
 		dial_status = ast_json_string_get(dial_status_blob);
 	}
 
-	CDR_DEBUG(mod_cfg, "Dial %s message for %s, %s: %u.%08u\n",
-			ast_strlen_zero(dial_status) ? "Begin" : "End",
-			caller ? caller->name : "(none)",
-			peer ? peer->name : "(none)",
-			(unsigned int)stasis_message_timestamp(message)->tv_sec,
-			(unsigned int)stasis_message_timestamp(message)->tv_usec);
+	CDR_DEBUG("Dial %s message for %s, %s: %u.%08u\n",
+		ast_strlen_zero(dial_status) ? "Begin" : "End",
+		caller ? caller->name : "(none)",
+		peer ? peer->name : "(none)",
+		(unsigned int)stasis_message_timestamp(message)->tv_sec,
+		(unsigned int)stasis_message_timestamp(message)->tv_usec);
 
 	/* Figure out who is running this show */
 	if (caller) {
@@ -1986,10 +1997,10 @@ static void handle_dial_message(void *data, struct stasis_subscription *sub, str
 			if (!it_cdr->fn_table->process_dial_begin) {
 				continue;
 			}
-			CDR_DEBUG(mod_cfg, "%p - Processing Dial Begin message for channel %s, peer %s\n",
-					it_cdr,
-					caller ? caller->name : "(none)",
-					peer ? peer->name : "(none)");
+			CDR_DEBUG("%p - Processing Dial Begin message for channel %s, peer %s\n",
+				it_cdr,
+				caller ? caller->name : "(none)",
+				peer ? peer->name : "(none)");
 			res &= it_cdr->fn_table->process_dial_begin(it_cdr,
 					caller,
 					peer);
@@ -1997,10 +2008,10 @@ static void handle_dial_message(void *data, struct stasis_subscription *sub, str
 			if (!it_cdr->fn_table->process_dial_end) {
 				continue;
 			}
-			CDR_DEBUG(mod_cfg, "%p - Processing Dial End message for channel %s, peer %s\n",
-					it_cdr,
-					caller ? caller->name : "(none)",
-					peer ? peer->name : "(none)");
+			CDR_DEBUG("%p - Processing Dial End message for channel %s, peer %s\n",
+				it_cdr,
+				caller ? caller->name : "(none)",
+				peer ? peer->name : "(none)");
 			it_cdr->fn_table->process_dial_end(it_cdr,
 					caller,
 					peer,
@@ -2090,7 +2101,6 @@ static int check_new_cdr_needed(struct ast_channel_snapshot *old_snapshot,
 static void handle_channel_cache_message(void *data, struct stasis_subscription *sub, struct stasis_message *message)
 {
 	struct cdr_object *cdr;
-	RAII_VAR(struct module_config *, mod_cfg, ao2_global_obj_ref(module_configs), ao2_cleanup);
 	struct stasis_cache_update *update = stasis_message_data(message);
 	struct ast_channel_snapshot *old_snapshot;
 	struct ast_channel_snapshot *new_snapshot;
@@ -2148,7 +2158,7 @@ static void handle_channel_cache_message(void *data, struct stasis_subscription
 				}
 			}
 		} else {
-			CDR_DEBUG(mod_cfg, "%p - Beginning finalize/dispatch for %s\n", cdr, old_snapshot->name);
+			CDR_DEBUG("%p - Beginning finalize/dispatch for %s\n", cdr, old_snapshot->name);
 			for (it_cdr = cdr; it_cdr; it_cdr = it_cdr->next) {
 				cdr_object_finalize(it_cdr);
 			}
@@ -2228,8 +2238,6 @@ static void handle_bridge_leave_message(void *data, struct stasis_subscription *
 	struct ast_bridge_blob *update = stasis_message_data(message);
 	struct ast_bridge_snapshot *bridge = update->bridge;
 	struct ast_channel_snapshot *channel = update->channel;
-	RAII_VAR(struct module_config *, mod_cfg,
-			ao2_global_obj_ref(module_configs), ao2_cleanup);
 	struct cdr_object *cdr;
 	struct cdr_object *it_cdr;
 	struct bridge_leave_data leave_data = {
@@ -2246,10 +2254,10 @@ static void handle_bridge_leave_message(void *data, struct stasis_subscription *
 		return;
 	}
 
-	CDR_DEBUG(mod_cfg, "Bridge Leave message for %s: %u.%08u\n",
-			channel->name,
-			(unsigned int)stasis_message_timestamp(message)->tv_sec,
-			(unsigned int)stasis_message_timestamp(message)->tv_usec);
+	CDR_DEBUG("Bridge Leave message for %s: %u.%08u\n",
+		channel->name,
+		(unsigned int)stasis_message_timestamp(message)->tv_sec,
+		(unsigned int)stasis_message_timestamp(message)->tv_usec);
 
 	cdr = ao2_find(active_cdrs_by_channel, channel->uniqueid, OBJ_SEARCH_KEY);
 	if (!cdr) {
@@ -2264,8 +2272,8 @@ static void handle_bridge_leave_message(void *data, struct stasis_subscription *
 		if (!it_cdr->fn_table->process_bridge_leave) {
 			continue;
 		}
-		CDR_DEBUG(mod_cfg, "%p - Processing Bridge Leave for %s\n",
-				it_cdr, channel->name);
+		CDR_DEBUG("%p - Processing Bridge Leave for %s\n",
+			it_cdr, channel->name);
 		if (!it_cdr->fn_table->process_bridge_leave(it_cdr, bridge, channel)) {
 			ast_string_field_set(it_cdr, bridge, "");
 			left_bridge = 1;
@@ -2293,8 +2301,6 @@ static void handle_bridge_leave_message(void *data, struct stasis_subscription *
 static void bridge_candidate_add_to_cdr(struct cdr_object *cdr,
 		struct cdr_object_snapshot *party_b)
 {
-	RAII_VAR(struct module_config *,  mod_cfg,
-		ao2_global_obj_ref(module_configs), ao2_cleanup);
 	struct cdr_object *new_cdr;
 
 	new_cdr = cdr_object_create_and_append(cdr);
@@ -2305,7 +2311,7 @@ static void bridge_candidate_add_to_cdr(struct cdr_object *cdr,
 	cdr_object_check_party_a_answer(new_cdr);
 	ast_string_field_set(new_cdr, bridge, cdr->bridge);
 	cdr_object_transition_state(new_cdr, &bridge_state_fn_table);
-	CDR_DEBUG(mod_cfg, "%p - Party A %s has new Party B %s\n",
+	CDR_DEBUG("%p - Party A %s has new Party B %s\n",
 		new_cdr, new_cdr->party_a.snapshot->name,
 		party_b->snapshot->name);
 }
@@ -2324,8 +2330,6 @@ static void bridge_candidate_add_to_cdr(struct cdr_object *cdr,
  */
 static int bridge_candidate_process(struct cdr_object *cdr, struct cdr_object *base_cand_cdr)
 {
-	RAII_VAR(struct module_config *, mod_cfg,
-		ao2_global_obj_ref(module_configs), ao2_cleanup);
 	struct cdr_object_snapshot *party_a;
 	struct cdr_object *cand_cdr;
 
@@ -2358,7 +2362,7 @@ static int bridge_candidate_process(struct cdr_object *cdr, struct cdr_object *b
 			&& strcasecmp(cand_cdr->party_b.snapshot->name, cdr->party_a.snapshot->name)) {
 			bridge_candidate_add_to_cdr(cand_cdr, &cdr->party_a);
 		} else {
-			CDR_DEBUG(mod_cfg, "%p - Party A %s has new Party B %s\n",
+			CDR_DEBUG("%p - Party A %s has new Party B %s\n",
 				cand_cdr, cand_cdr->party_a.snapshot->name,
 				cdr->party_a.snapshot->name);
 			cdr_object_snapshot_copy(&cand_cdr->party_b, &cdr->party_a);
@@ -2408,8 +2412,6 @@ static void handle_parking_bridge_enter_message(struct cdr_object *cdr,
 		struct ast_bridge_snapshot *bridge,
 		struct ast_channel_snapshot *channel)
 {
-	RAII_VAR(struct module_config *, mod_cfg,
-			ao2_global_obj_ref(module_configs), ao2_cleanup);
 	int res = 1;
 	struct cdr_object *it_cdr;
 	struct cdr_object *new_cdr;
@@ -2421,8 +2423,8 @@ static void handle_parking_bridge_enter_message(struct cdr_object *cdr,
 			res &= it_cdr->fn_table->process_parking_bridge_enter(it_cdr, bridge, channel);
 		}
 		if (it_cdr->fn_table->process_party_a) {
-			CDR_DEBUG(mod_cfg, "%p - Updating Party A %s snapshot\n", it_cdr,
-					channel->name);
+			CDR_DEBUG("%p - Updating Party A %s snapshot\n", it_cdr,
+				channel->name);
 			it_cdr->fn_table->process_party_a(it_cdr, channel);
 		}
 	}
@@ -2448,8 +2450,6 @@ static void handle_standard_bridge_enter_message(struct cdr_object *cdr,
 		struct ast_bridge_snapshot *bridge,
 		struct ast_channel_snapshot *channel)
 {
-	RAII_VAR(struct module_config *, mod_cfg,
-			ao2_global_obj_ref(module_configs), ao2_cleanup);
 	enum process_bridge_enter_results result;
 	struct cdr_object *it_cdr;
 	struct cdr_object *new_cdr;
@@ -2459,15 +2459,15 @@ static void handle_standard_bridge_enter_message(struct cdr_object *cdr,
 
 	for (it_cdr = cdr; it_cdr; it_cdr = it_cdr->next) {
 		if (it_cdr->fn_table->process_party_a) {
-			CDR_DEBUG(mod_cfg, "%p - Updating Party A %s snapshot\n", it_cdr,
-					channel->name);
+			CDR_DEBUG("%p - Updating Party A %s snapshot\n", it_cdr,
+				channel->name);
 			it_cdr->fn_table->process_party_a(it_cdr, channel);
 		}
 
 		/* Notify all states that they have entered a bridge */
 		if (it_cdr->fn_table->process_bridge_enter) {
-			CDR_DEBUG(mod_cfg, "%p - Processing bridge enter for %s\n", it_cdr,
-					channel->name);
+			CDR_DEBUG("%p - Processing bridge enter for %s\n", it_cdr,
+				channel->name);
 			result = it_cdr->fn_table->process_bridge_enter(it_cdr, bridge, channel);
 			switch (result) {
 			case BRIDGE_ENTER_ONLY_PARTY:
@@ -2530,8 +2530,6 @@ static void handle_bridge_enter_message(void *data, struct stasis_subscription *
 	struct ast_bridge_snapshot *bridge = update->bridge;
 	struct ast_channel_snapshot *channel = update->channel;
 	struct cdr_object *cdr;
-	RAII_VAR(struct module_config *, mod_cfg,
-			ao2_global_obj_ref(module_configs), ao2_cleanup);
 
 	if (filter_bridge_messages(bridge)) {
 		return;
@@ -2541,10 +2539,10 @@ static void handle_bridge_enter_message(void *data, struct stasis_subscription *
 		return;
 	}
 
-	CDR_DEBUG(mod_cfg, "Bridge Enter message for channel %s: %u.%08u\n",
-			channel->name,
-			(unsigned int)stasis_message_timestamp(message)->tv_sec,
-			(unsigned int)stasis_message_timestamp(message)->tv_usec);
+	CDR_DEBUG("Bridge Enter message for channel %s: %u.%08u\n",
+		channel->name,
+		(unsigned int)stasis_message_timestamp(message)->tv_sec,
+		(unsigned int)stasis_message_timestamp(message)->tv_usec);
 
 	cdr = ao2_find(active_cdrs_by_channel, channel->uniqueid, OBJ_SEARCH_KEY);
 	if (!cdr) {
@@ -2574,8 +2572,6 @@ static void handle_parked_call_message(void *data, struct stasis_subscription *s
 	struct ast_parked_call_payload *payload = stasis_message_data(message);
 	struct ast_channel_snapshot *channel = payload->parkee;
 	struct cdr_object *cdr;
-	RAII_VAR(struct module_config *, mod_cfg,
-			ao2_global_obj_ref(module_configs), ao2_cleanup);
 	int unhandled = 1;
 	struct cdr_object *it_cdr;
 
@@ -2593,10 +2589,10 @@ static void handle_parked_call_message(void *data, struct stasis_subscription *s
 		return;
 	}
 
-	CDR_DEBUG(mod_cfg, "Parked Call message for channel %s: %u.%08u\n",
-			channel->name,
-			(unsigned int)stasis_message_timestamp(message)->tv_sec,
-			(unsigned int)stasis_message_timestamp(message)->tv_usec);
+	CDR_DEBUG("Parked Call message for channel %s: %u.%08u\n",
+		channel->name,
+		(unsigned int)stasis_message_timestamp(message)->tv_sec,
+		(unsigned int)stasis_message_timestamp(message)->tv_usec);
 
 	cdr = ao2_find(active_cdrs_by_channel, channel->uniqueid, OBJ_SEARCH_KEY);
 	if (!cdr) {
@@ -2646,20 +2642,37 @@ static void handle_cdr_sync_message(void *data, struct stasis_subscription *sub,
 
 struct ast_cdr_config *ast_cdr_get_config(void)
 {
-	RAII_VAR(struct module_config *, mod_cfg, ao2_global_obj_ref(module_configs), ao2_cleanup);
-	ao2_ref(mod_cfg->general, +1);
-	return mod_cfg->general;
+	struct ast_cdr_config *general;
+	struct module_config *mod_cfg;
+
+	mod_cfg = ao2_global_obj_ref(module_configs);
+	if (!mod_cfg) {
+		return NULL;
+	}
+	general = ao2_bump(mod_cfg->general);
+	ao2_cleanup(mod_cfg);
+	return general;
 }
 
 void ast_cdr_set_config(struct ast_cdr_config *config)
 {
-	RAII_VAR(struct module_config *, mod_cfg, ao2_global_obj_ref(module_configs), ao2_cleanup);
+	struct module_config *mod_cfg;
+
+	if (!config) {
+		return;
+	}
+
+	mod_cfg = ao2_global_obj_ref(module_configs);
+	if (!mod_cfg) {
+		return;
+	}
 
-	ao2_cleanup(mod_cfg->general);
-	mod_cfg->general = config;
-	ao2_ref(mod_cfg->general, +1);
+	ao2_replace(mod_cfg->general, config);
 
+	cdr_set_debug_mode(mod_cfg);
 	cdr_toggle_runtime_options();
+
+	ao2_cleanup(mod_cfg);
 }
 
 int ast_cdr_is_enabled(void)
@@ -3299,15 +3312,20 @@ void ast_cdr_setuserfield(const char *channel_name, const char *userfield)
 
 static void post_cdr(struct ast_cdr *cdr)
 {
-	RAII_VAR(struct module_config *, mod_cfg, ao2_global_obj_ref(module_configs), ao2_cleanup);
+	struct module_config *mod_cfg;
 	struct cdr_beitem *i;
 
+	mod_cfg = ao2_global_obj_ref(module_configs);
+	if (!mod_cfg) {
+		return;
+	}
+
 	for (; cdr ; cdr = cdr->next) {
 		/* For people, who don't want to see unanswered single-channel events */
 		if (!ast_test_flag(&mod_cfg->general->settings, CDR_UNANSWERED) &&
 				cdr->disposition < AST_CDR_ANSWERED &&
 				(ast_strlen_zero(cdr->channel) || ast_strlen_zero(cdr->dstchannel))) {
-			ast_debug(1, "Skipping CDR  for %s since we weren't answered\n", cdr->channel);
+			ast_debug(1, "Skipping CDR for %s since we weren't answered\n", cdr->channel);
 			continue;
 		}
 
@@ -3329,6 +3347,7 @@ static void post_cdr(struct ast_cdr *cdr)
 		}
 		AST_RWLIST_UNLOCK(&be_list);
 	}
+	ao2_cleanup(mod_cfg);
 }
 
 int ast_cdr_set_property(const char *channel_name, enum ast_cdr_options option)
@@ -3547,7 +3566,7 @@ static void *do_batch_backend_process(void *data)
 
 static void cdr_submit_batch(int do_shutdown)
 {
-	RAII_VAR(struct module_config *, mod_cfg, ao2_global_obj_ref(module_configs), ao2_cleanup);
+	struct module_config *mod_cfg;
 	struct cdr_batch_item *oldbatchitems = NULL;
 	pthread_t batch_post_thread = AST_PTHREADT_NULL;
 
@@ -3562,9 +3581,13 @@ static void cdr_submit_batch(int do_shutdown)
 	reset_batch();
 	ast_mutex_unlock(&cdr_batch_lock);
 
+	mod_cfg = ao2_global_obj_ref(module_configs);
+
 	/* if configured, spawn a new thread to post these CDRs,
 	   also try to save as much as possible if we are shutting down safely */
-	if (ast_test_flag(&mod_cfg->general->batch_settings.settings, BATCH_MODE_SCHEDULER_ONLY) || do_shutdown) {
+	if (!mod_cfg
+		|| ast_test_flag(&mod_cfg->general->batch_settings.settings, BATCH_MODE_SCHEDULER_ONLY)
+		|| do_shutdown) {
 		ast_debug(1, "CDR single-threaded batch processing begins now\n");
 		do_batch_backend_process(oldbatchitems);
 	} else {
@@ -3575,17 +3598,27 @@ static void cdr_submit_batch(int do_shutdown)
 			ast_debug(1, "CDR multi-threaded batch processing begins now\n");
 		}
 	}
+
+	ao2_cleanup(mod_cfg);
 }
 
 static int submit_scheduled_batch(const void *data)
 {
-	RAII_VAR(struct module_config *, mod_cfg, ao2_global_obj_ref(module_configs), ao2_cleanup);
+	struct module_config *mod_cfg;
+
 	cdr_submit_batch(0);
-	/* manually reschedule from this point in time */
 
+	mod_cfg = ao2_global_obj_ref(module_configs);
+	if (!mod_cfg) {
+		return 0;
+	}
+
+	/* manually reschedule from this point in time */
 	ast_mutex_lock(&cdr_sched_lock);
 	cdr_sched = ast_sched_add(sched, mod_cfg->general->batch_settings.time * 1000, submit_scheduled_batch, NULL);
 	ast_mutex_unlock(&cdr_sched_lock);
+
+	ao2_cleanup(mod_cfg);
 	/* returning zero so the scheduler does not automatically reschedule */
 	return 0;
 }
@@ -3619,7 +3652,7 @@ static void cdr_detach(struct ast_cdr *cdr)
 	}
 
 	/* maybe they disabled CDR stuff completely, so just drop it */
-	if (!ast_test_flag(&mod_cfg->general->settings, CDR_ENABLED)) {
+	if (!mod_cfg || !ast_test_flag(&mod_cfg->general->settings, CDR_ENABLED)) {
 		ast_debug(1, "Dropping CDR !\n");
 		ast_cdr_free(cdr);
 		return;
@@ -3697,7 +3730,7 @@ static void *do_cdr(void *data)
 
 static char *handle_cli_debug(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
 {
-	RAII_VAR(struct module_config *, mod_cfg, ao2_global_obj_ref(module_configs), ao2_cleanup);
+	struct module_config *mod_cfg;
 
 	switch (cmd) {
 	case CLI_INIT:
@@ -3715,6 +3748,11 @@ static char *handle_cli_debug(struct ast_cli_entry *e, int cmd, struct ast_cli_a
 		return CLI_SHOWUSAGE;
 	}
 
+	mod_cfg = ao2_global_obj_ref(module_configs);
+	if (!mod_cfg) {
+		ast_cli(a->fd, "Could not set CDR debugging mode\n");
+		return CLI_SUCCESS;
+	}
 	if (!strcasecmp(a->argv[3], "on")
 		&& !ast_test_flag(&mod_cfg->general->settings, CDR_DEBUG)) {
 		ast_set_flag(&mod_cfg->general->settings, CDR_DEBUG);
@@ -3724,6 +3762,8 @@ static char *handle_cli_debug(struct ast_cli_entry *e, int cmd, struct ast_cli_a
 		ast_clear_flag(&mod_cfg->general->settings, CDR_DEBUG);
 		ast_cli(a->fd, "CDR debugging disabled\n");
 	}
+	cdr_set_debug_mode(mod_cfg);
+	ao2_cleanup(mod_cfg);
 
 	return CLI_SUCCESS;
 }
@@ -3910,7 +3950,7 @@ static char *handle_cli_show(struct ast_cli_entry *e, int cmd, struct ast_cli_ar
 static char *handle_cli_status(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
 {
 	struct cdr_beitem *beitem = NULL;
-	RAII_VAR(struct module_config *, mod_cfg, ao2_global_obj_ref(module_configs), ao2_cleanup);
+	struct module_config *mod_cfg;
 	int cnt = 0;
 	long nextbatchtime = 0;
 
@@ -3929,6 +3969,11 @@ static char *handle_cli_status(struct ast_cli_entry *e, int cmd, struct ast_cli_
 		return CLI_SHOWUSAGE;
 	}
 
+	mod_cfg = ao2_global_obj_ref(module_configs);
+	if (!mod_cfg) {
+		return CLI_FAILURE;
+	}
+
 	ast_cli(a->fd, "\n");
 	ast_cli(a->fd, "Call Detail Record (CDR) settings\n");
 	ast_cli(a->fd, "----------------------------------\n");
@@ -3965,12 +4010,13 @@ static char *handle_cli_status(struct ast_cli_entry *e, int cmd, struct ast_cli_
 		ast_cli(a->fd, "\n");
 	}
 
+	ao2_cleanup(mod_cfg);
 	return CLI_SUCCESS;
 }
 
 static char *handle_cli_submit(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
 {
-	RAII_VAR(struct module_config *, mod_cfg, ao2_global_obj_ref(module_configs), ao2_cleanup);
+	struct module_config *mod_cfg;
 
 	switch (cmd) {
 	case CLI_INIT:
@@ -3987,18 +4033,20 @@ static char *handle_cli_submit(struct ast_cli_entry *e, int cmd, struct ast_cli_
 		return CLI_SHOWUSAGE;
 	}
 
-	if (!ast_test_flag(&mod_cfg->general->settings, CDR_ENABLED)) {
-		ast_cli(a->fd, "Cannot submit CDR batch: CDR engine disabled.\n");
-		return CLI_SUCCESS;
+	mod_cfg = ao2_global_obj_ref(module_configs);
+	if (!mod_cfg) {
+		return CLI_FAILURE;
 	}
 
-	if (ast_test_flag(&mod_cfg->general->settings, CDR_BATCHMODE)) {
+	if (!ast_test_flag(&mod_cfg->general->settings, CDR_ENABLED)) {
+		ast_cli(a->fd, "Cannot submit CDR batch: CDR engine disabled.\n");
+	} else if (ast_test_flag(&mod_cfg->general->settings, CDR_BATCHMODE)) {
 		ast_cli(a->fd, "Cannot submit CDR batch: batch mode not enabled.\n");
-		return CLI_SUCCESS;
+	} else {
+		submit_unscheduled_batch();
+		ast_cli(a->fd, "Submitted CDRs to backend engines for processing.  This may take a while.\n");
 	}
-
-	submit_unscheduled_batch();
-	ast_cli(a->fd, "Submitted CDRs to backend engines for processing.  This may take a while.\n");
+	ao2_cleanup(mod_cfg);
 
 	return CLI_SUCCESS;
 }
@@ -4094,8 +4142,6 @@ static int create_subscriptions(void)
 
 static int process_config(int reload)
 {
-	RAII_VAR(struct module_config *, mod_cfg, module_config_alloc(), ao2_cleanup);
-
 	if (!reload) {
 		if (aco_info_init(&cfg_info)) {
 			return 1;
@@ -4114,19 +4160,26 @@ static int process_config(int reload)
 		aco_option_register(&cfg_info, "time", ACO_EXACT, general_options, DEFAULT_BATCH_TIME, OPT_UINT_T, PARSE_IN_RANGE, FLDSET(struct ast_cdr_config, batch_settings.time), 0, MAX_BATCH_TIME);
 	}
 
-	if (aco_process_config(&cfg_info, reload)) {
-		if (!mod_cfg) {
+	if (aco_process_config(&cfg_info, reload) == ACO_PROCESS_ERROR) {
+		struct module_config *mod_cfg;
+
+		if (reload) {
 			return 1;
 		}
+
 		/* If we couldn't process the configuration and this wasn't a reload,
 		 * create a default config
 		 */
-		if (!reload && !(aco_set_defaults(&general_option, "general", mod_cfg->general))) {
-			ast_log(LOG_NOTICE, "Failed to process CDR configuration; using defaults\n");
-			ao2_global_obj_replace_unref(module_configs, mod_cfg);
-			return 0;
+		mod_cfg = module_config_alloc();
+		if (!mod_cfg
+			|| aco_set_defaults(&general_option, "general", mod_cfg->general)) {
+			ao2_cleanup(mod_cfg);
+			return 1;
 		}
-		return 1;
+		ast_log(LOG_NOTICE, "Failed to process CDR configuration; using defaults\n");
+		ao2_global_obj_replace_unref(module_configs, mod_cfg);
+		cdr_set_debug_mode(mod_cfg);
+		ao2_cleanup(mod_cfg);
 	}
 
 	return 0;
@@ -4213,13 +4266,15 @@ static void cdr_container_print_fn(void *v_obj, void *where, ao2_prnt_fn *prnt)
  */
 static int cdr_toggle_runtime_options(void)
 {
-	RAII_VAR(struct module_config *, mod_cfg,
-		ao2_global_obj_ref(module_configs), ao2_cleanup);
+	struct module_config *mod_cfg;
 
-	if (ast_test_flag(&mod_cfg->general->settings, CDR_ENABLED)) {
+	mod_cfg = ao2_global_obj_ref(module_configs);
+	if (mod_cfg
+		&& ast_test_flag(&mod_cfg->general->settings, CDR_ENABLED)) {
 		if (create_subscriptions()) {
 			destroy_subscriptions();
 			ast_log(AST_LOG_ERROR, "Failed to create Stasis subscriptions\n");
+			ao2_cleanup(mod_cfg);
 			return -1;
 		}
 		if (ast_test_flag(&mod_cfg->general->settings, CDR_BATCHMODE)) {
@@ -4231,8 +4286,9 @@ static int cdr_toggle_runtime_options(void)
 		destroy_subscriptions();
 		ast_log(LOG_NOTICE, "CDR logging disabled.\n");
 	}
+	ao2_cleanup(mod_cfg);
 
-	return 0;
+	return mod_cfg ? 0 : -1;
 }
 
 int ast_cdr_engine_init(void)
@@ -4326,22 +4382,27 @@ void ast_cdr_engine_term(void)
 
 int ast_cdr_engine_reload(void)
 {
-	RAII_VAR(struct module_config *, old_mod_cfg, ao2_global_obj_ref(module_configs), ao2_cleanup);
-	RAII_VAR(struct module_config *, mod_cfg, NULL, ao2_cleanup);
+	struct module_config *old_mod_cfg;
+	struct module_config *mod_cfg;
+
+	old_mod_cfg = ao2_global_obj_ref(module_configs);
 
 	if (!old_mod_cfg || process_config(1)) {
+		ao2_cleanup(old_mod_cfg);
 		return -1;
 	}
 
 	mod_cfg = ao2_global_obj_ref(module_configs);
-
-	if (!ast_test_flag(&mod_cfg->general->settings, CDR_ENABLED) ||
-			!(ast_test_flag(&mod_cfg->general->settings, CDR_BATCHMODE))) {
+	if (!mod_cfg
+		|| !ast_test_flag(&mod_cfg->general->settings, CDR_ENABLED)
+		|| !ast_test_flag(&mod_cfg->general->settings, CDR_BATCHMODE)) {
 		/* If batch mode used to be enabled, finalize the batch */
 		if (ast_test_flag(&old_mod_cfg->general->settings, CDR_BATCHMODE)) {
 			finalize_batch_mode();
 		}
 	}
+	ao2_cleanup(mod_cfg);
 
+	ao2_cleanup(old_mod_cfg);
 	return cdr_toggle_runtime_options();
 }